How much money has Claude's prompt cache saved you?
Calculates the real dollar value of prompt caching — the difference between what you paid and what you would have paid if every cached token was billed as fresh input.
npx cc-save
npx cc-save --jsonOverride pricing (default: Sonnet 4.6):
npx cc-save --input=3.00 --cache-r=0.30 --cache-w=3.75 --output=15.00Or open index.html in a browser and drag in .jsonl files.
- Savings —
cache_read_tokens × (input_price - cache_read_price) / 1M - Cache hit rate — % of input tokens served from cache vs fresh
- Cost breakdown — actual vs hypothetical total
- Per-session average — savings and cost per session
cc-save — How much money has Claude's prompt cache saved you?
$59.7K saved by prompt caching
86% of what you'd pay without caching
Cost breakdown (519 sessions, 219,669 turns)
Input (fresh) $15.35 5.1M tokens × $3.00/1M
Cache reads $6.6K 22.1B tokens × $0.30/1M
Cache written $2.5K 668.7M tokens × $3.75/1M
Output $291.82 19.5M tokens × $15.00/1M
──────────────────────────────────────────
Actual total $9.4K
Without caching $69.1K (if cache reads billed as fresh input)
Cache efficiency
Hit rate 97% of total input tokens served from cache
Cache multiplier 10× cheaper per token
Per session $115.00 saved / $18.20 actual cost
Prompt caching saved you $59.7K (86% of your hypothetical bill).
MIT
Claude Code Ops Kit ($19) — 16 production hooks + 5 templates + 3 tools. Built from 160+ hours of autonomous operation.